I work with GIMP.
Photoshop is boring and has too many features and you don't really get to make thing, because it has it all for you... and if you mix them they don't work out the way you may wish.
With GIMP I customise everything in my own style, which is changing more and more... I've recently tried as few GOON style avatars. Which have turned out... amazing.

And yeah the Destruction one as I said, was me just playing around making something completely random, when I look at it nowadays I see so much more I could of added, to improve it, make it grab the eye and make it more... realistic with my current effects I've taught myself.
As for the gear one I must agree, I've tried to change the colour shades but it doesn't look right, best darker... and if people don't have their tints up to scratch, then thats not my fault lol.
I work for display and my own experimentation, not to look good on everyones screen XD
Also, this is my latest space graphic. It is still in the making, over 300 layers so far.
It... just needs something, but I'm not sure what yet

What you think? Taken me 10 hours so far.
Going to border it once finished.